The faster your dog is moving, the higher level of intensity is issued.

Add as many collars as you like to contain as animals you have. There is no limit to the number of collars it can control.

Up to 5000 square meters range(over 1.24 acre).

Gives your dog a free activity space with no visible limits, and at the same time, you don't need to worry about lost.

When you dog Approaches the boundary, the signal causes the dog’s collar receiver to deliver a warning beep first. If your dog continues closer to the boundary, the system will issue a mild shock. If your dog continues further, the system will issue stronger shocks until your dog returns to within the boundary your have set up. Your dog will naturally seek to avoid correction, and is content staying within established boundaries.